Machine for the production of iron turnings.



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Patented Feb. 20, 1917.

APPLICATION FILED JUNE 22. 19M.

E. COTTARD.

MACHINE FOR THE PRODUCTION OF IRON TURNINGS.

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MACHINE FOR THE PRODUCHON 0F IRGN. TURNINGS.

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MACHINE FOR THE PRODUCTION OF IRON TURNINGS.

APPLICATION FILED JUNE 22, I914- Iatented Feb. 20, 1917.

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NEZEL, FRANCE.

MAGHINE FOR THE PRODUCTION OF IRON TURNINGS misses.

Specification of Letters Patent.

Application filed June 22, 1914. Serial No. 846,461.

To all whom it may concern:

Be it known that I, EDOUARD OorrARD, citizen of the Republic of France, residing at Nezel, Seine et Oise, in the Republic of France, have invented new and useful Tmprovements in Machines for the Production of Iron Turnings, of which the following is a specification.

This invention relates to machines for the production of long and thin iron turnings in which the bar or rod from which the same are produced is operated upon simultaneously throughout a great part of its length by a large number of tools mounted on the same tool carrier insuring a large production.

According to the present invention, the longitudinal displacement of the bar, which receives also a movement of rotation is effected by means of a feeding arrangement which forms a thread on the bar and acts upon the part of the bar whichhas already been acted upon by the tools producing the iron turnings.

A machine thus arranged insures regular working, it occupies the minimum space and has a very large output.

In the accompanying drawings which illustrate the invention:

Figure 1 is a view of the whole machine,

Figs. 2 and 3 are details of the arrangement for effecting rotation of the bar;

Fig. 4 is a section of the tool holder slide;

Figs. 5, 6 and 7 are details of the arrangement for electing longitudinal increment of the bar.

On the base 1 of the machine, at one of its ends, is fixed a headstock 2 which serves as a bearing for a hollow shaft 3, provided with a ball thrust bearing 4. On the shaft 3 is keyed a sprocket wheel for imparting to it a rotary movement and driven by a chain 6 from a sprocket wheel 7, keyed on a transmission shaft 8. The shaft 3 is also provided with a locking mandrel intended to communicate a rotary movement to the bar 16 from which the chips of iron will be cut off. This mandrel is formed by a sleeve 9 (Figs. 1, 2 and 3) on which are threaded the members 10 and 11 having conical openings 10 and 11? respectively which act on the ends suitably shaped, of small cylinders or blocks 12, 13, which are disposed radially and are adapted to slide in the recesses in the sleeve 9. The small cylinders 12, 13

tool h older by 7 provided with a casing are provided with rollers 14, 15 having a cutting edge which permits them to bite into the bar 16 to be treated when the former is moved longitudinally.

The bar 16 is first shaped in such manner as to have a cylindrical part 16, a conical part 17 and another cylindrical part 18 of smaller diameter than the first.

The conical part 17 of the bar extends throughout the length of the tool holder 19, provided with a large number of small high speed tools 20 maintained in place, in the and 4). The position of the tool holder relatively to the bar may be regulated by means of a screw 22 carried by a base 23 fixed to the framework 1 and in which the tool holder is suitably guided.

The part 18 of the bar passes into a hollow shaft 24 supported by a headstock 25, fixed to the framework 1 of the machine. The shaft 24 is provided with a mandrel 26 similar to the mandrel 9, with this exception that the rollers of thismandrel have their akcs parallel to the bar and have their edges rounded so as to be able to roll on the bar without preventing longitudinal displacement of said bar. The shaft 24 is also 27 on which is fixed a sprocket wheel 28 connected by a chain 29 with another sprocket wheel 30, keyed on the transmission shaft 8. A ball thrust bearing 31 is interposed between the casing 27 and the headstock 25. In the casing 27 are fixed a die or screwing chuck 32 and a nut in two parts 33 and (Figs. 1, 5, 6 and 7). The screwing chuck 32 is formed by a universal chuck of known type, the jaws of which have been replaced by cutting dies 32 pieces, may be separated when engage the bar operated on. tained closed by the screws 34.

The operation of the machine is as foldesired to dis It is mainlowsz-the bar, 16, 17, 18 to be treated, be-

ing shaped as stated, the end of the part 18 is threaded to the pitch of the die 32, 32. The bar thus formed is introduced into -the machine as shown in Fig. 1; the mandrels 9 and 26 are looked as also are the chasers 32 of the die 32; the shaft 8 in rotating imparts rotary movement to the shaft 3 which transmits its movement to the bar through the medium of the rollers 14, 15 of the mandrel 9 which holds this bar firmly.

The nut 33, 33*, being in two v Patented Feb. so, rem.

means of screws 21 (Figs. 1

The shaft 8 imparts also a movement of re length hasbeen formed, the end of the part 18 engages the nut33, 33, which then alone produces movement of the bar, the 'die having no other function than producing the thread. 7 From the manner of mounting it will be seen that all reactions of the parts are sustained by the ball thrust bearings l and 31 and-.bythe nut 33, 33 which insures efficient operation of the machine.

It will be seen that it is very easy to regu- Y late the longitudinal movement of the bar;

to do this, it is sufiicient to change the amount of the differential movement which may be effected by changing the diameter of the wheel 28 for example.

The ends of the tools 20 being located on a parallel to the generatrix of the cone 17 it will be seen that it is sufficient to operate the screw. 22 to regulate the thickness of the cut andfconsequently the degree of fineness of the iron turnings obtained on the machine.

Having now described my invention, what I claim as new and desire to secure by Letters Patentis: a

LA machine for making iron turnings from a bar, comprising a number of cutting tools arranged along the bar and movable toward and away from the bar, means for rotatingsaid bar and means for feeding the bar longitudinally by forming athread along the bar in the part which has been acted upon by the tools, substantially as de scribed and for the purpose set forth.

2; 'A machine for making iron turnings from a bar, comprising a number of cutting tools arrangedalong the bar and movable toward and away from the bar, means for (topics ofthis patent may be obtained for rotating said bar, a die adapted to form a thread along the bar in the part which has been acted upon by the tools and a nut engaging the threads formed to feed the bar forward, substantially as described and for the purpose set forth.

3. In a machine for making iron turnrings, tools for cutting iron turnings from a bar, means for rotating said bar, a die adapted to form a thread along the bar in the part which has been acted upon by the tools, a nut engaging the threads thus formed to feed the bar, a. casing carrying the die and the nut, and means for rotating said casing in the same direction as the bar at a lower speed, substantially as described and for the'purpose set forth.

+L. In a machine for making iron turnings, tools for cutting iron turnings from a bar, means for rotating said bar, a die adapted to form a thread along the bar in the part which has been acted upon by the tools, a nut engaging the threads thus formed to feed the bar, a casing carrying the die and the nut, means for rotating said casing in the same direction as the bar at a lower speed, a hollow shaft secured to the casing, a headstock for supporting said shaft and rollers mounted on the hollow shaft for supporting the bar, substantially as described and for the purpose set forth.

5. In a machine for making iron turnings, tools for cutting iron turnings from a bar, a hollow shaft through which the bar extends, means for rotating said shaft, blocks sliding radially in said shaft, rollers mounted on said blocks and adapted to impart to the bar a rotary movement, a nut screwed upon the shaft and engaging with said radial blocks, and means for feeding the bar longitudinally by forming a thr ad thereon, substantially as described and for the purpose set forth.

In testimony whereof I have signed. my name to this specification in the presence of two subscribing witnesses.

EDOUARD COTTARD.

itnesses LOUIS Moses, Crras. P. PnnssLY.

Washington, D. G. 

